[Mlir-commits] [mlir] Folding extract_strided_metadata input into reinterpret_cast on constant layout (PR #134845)

[Matthias Springer]

================
@@ -2045,44 +2050,65 @@ struct ReinterpretCastOpExtractStridedMetadataFolder
         op.getSource().getDefiningOp<ExtractStridedMetadataOp>();
     if (!extractStridedMetadata)
       return failure();
+
     // Check if the reinterpret cast reconstructs a memref with the exact same
     // properties as the extract strided metadata.
-
-    // First, check that the strides are the same.
     SmallVector<OpFoldResult> extractStridesOfr =
         extractStridedMetadata.getConstifiedMixedStrides();
     SmallVector<OpFoldResult> reinterpretStridesOfr =
         op.getConstifiedMixedStrides();
-    if (extractStridesOfr.size() != reinterpretStridesOfr.size())
-      return failure();
+    auto isReinterpretCastNoop = [&]() -> bool {
+      // First, check that the strides are the same.
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matthias-springer wrote:

`llvm::equal`

https://github.com/llvm/llvm-project/pull/134845